Earthquakes!

Front

What is an earthquake?

Back

An earthquake is the shaking and trembling that results from the movement of rock beneath the Earth's surface.

Front

What is the epicenter of an earthquake?

Back

The epicenter is the point on the Earth's surface that is directly above the focus of an earthquake.

Front

What are seismic waves?

Back

Seismic waves are vibrations that travel through the Earth, similar to sound waves.

Front

What are P-waves?

Back

P-waves, or primary waves, are seismic waves that compress and expand the material they move through.

Front

What is compression in the context of earthquakes?

Back

Compression is the process where P-waves squeeze rock together.

Front

What is a normal fault?

Back

A normal fault is a type of fault where the hanging wall moves down relative to the footwall, typically due to extensional forces.

Front

What is the focus of an earthquake?

Back

The focus is the point within the Earth where an earthquake originates.

Front

What is a seismograph?

Back

A seismograph is an instrument that measures and records the motion of seismic waves.

Front

What is a seismometer?

Back

A seismometer is a device that detects and records the intensity and duration of seismic waves.

Front

What are S-waves?

Back

S-waves, or secondary waves, are seismic waves that move through the Earth and can only travel through solids.